/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: zhongyisheng
 * Date: 2024-09-23
 * Time: 16:35
 */
import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int count = 0;
        // 注意 hasNext 和 hasNextLine 的区别
        int [] arr = {1,2,3};
        System.out.println(arr.length);
    }
}